To me many words look or feel or sound like the thing they are referring to. This word doesn’t do that for me but I liked it anyway. The word Cachinnate means to laugh hard or loudly or in an unrestrained way. It is pronounced ‘cackinnate’ (thank you forvo.com) so I will now be able to remember it as we often cack ourselves laughing around here.
Unfortunately, saying ‘I am cachinnating myself’ sounds a little like you have trapped your arm in a coffee machine so I can see how the meaning might not be too obvious when it is used in normal conversation…ouch..